我在html中有以下类型的表,它是由php动态生成的:
<tr><td>Kiss the Girls</td><td>2016-01-01</td></tr>
<tr><td>Kiss the Girls</td><td>2016-02-05</td></tr>
<tr><td>Along Came a Spider</td><td>2016-01-07</td></tr>
<tr><td>Along Came a Spider</td><td>2016-01-22</td></tr>
<tr><td>Along Came a Spider</td><td>2016-03-31</td></tr>
我希望能够拥有一个动态显示过滤器,允许用户点击一个框并隐藏除最新版本的手稿之外的所有内容。所以它可能看起来像:
<tr><td>Kiss the Girls</td><td>2016-02-05</td></tr>
<tr><td>Along Came a Spider</td><td>2016-03-31</td></tr>
此时,<tr>
或<td>
标签都没有ID或类,但我可以轻松地将类添加到第一列(例如<td class='bookTitle'>
)。页面上只有一个表格,php已按日期对其进行排序。我对jQuery或原生JavaScript开放,但我认为使用jQuery会更容易。似乎可以通过在更改名称之前抓住最后一行来完成,但我不知道该怎么做。有什么想法吗?
答案 0 :(得分:1)
迭代tr
并存储在键值对中,其中key为td
内容,并将值作为对象,然后从中获取对象。
var a = {}; // object for storing dom element object
$('table tr').each(function() {
a[$('td:first', this).text().trim()] = this; // update the dom element object based on the column
});
var $res = $($.map(a, function(v) {
return v; // get objects and convert to jQuery object
}));
console.log($res);
$res.css('color', 'red');
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<table>
<tr>
<td>Kiss the Girls</td>
<td>2016-01-01</td>
</tr>
<tr>
<td>Kiss the Girls</td>
<td>2016-02-05</td>
</tr>
<tr>
<td>Along Came a Spider</td>
<td>2016-01-07</td>
</tr>
<tr>
<td>Along Came a Spider</td>
<td>2016-01-22</td>
</tr>
<tr>
<td>Along Came a Spider</td>
<td>2016-03-31</td>
</tr>
</table>
&#13;
<小时/> 仅供参考:如果您想维护订单,那么使用索引和对象数组的值,并根据
设置顺序
答案 1 :(得分:1)
根据'Seems like it could be done by just grabbing the last row before it changes names'
,这就是我提出来的:
var rows = $("table tr");
if(rows.length > 0){
var last = $(rows[0]).find('td')[0].innerText;
for(var i=1; i<rows.length; i++){
var row = $(rows[i]);
var text = row.find('td')[0].innerText;
if(text === last){
$(rows[i-1]).hide();
}
last = text;
}
}
请参阅Finding last occurrence of text上Tan Li Hau(@tanhauhau)的笔CodePen。
答案 2 :(得分:0)
您可以反向迭代并删除之前看到的所有内容:
function filterPreviousVersions ( ) {
var seen = {};
$( $('tr').get( ).reverse( ) ).each( function ( ) {
var text = $( 'td', this ).first( ).text();
if ( seen[ text ] )
$( this ).remove();
seen[ text ] = true;
} );
}
filterPreviousVersions();
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<table>
<tr>
<td>Kiss the Girls</td>
<td>2016-01-01</td>
</tr>
<tr>
<td>Kiss the Girls</td>
<td>2016-02-05</td>
</tr>
<tr>
<td>Along Came a Spider</td>
<td>2016-01-07</td>
</tr>
<tr>
<td>Along Came a Spider</td>
<td>2016-01-22</td>
</tr>
<tr>
<td>Along Came a Spider</td>
<td>2016-03-31</td>
</tr>
</table>
答案 3 :(得分:0)
如果在添加行时按递增顺序添加ID,
你可以用这个:
var valArray = [];
$('.maindiv').each(function() {
valArray.push(parseInt($(this).attr('id'), 10));
})
valArray.sort(function(a, b) {
return a - b
})
alert("Last row : " + document.getElementById(valArray[valArray.length - 1]).innerHTML); // highest`
alert("Second last : " + document.getElementById(valArray[valArray.length - 2]).innerHTML);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="2" class="maindiv">Contents in row 2</div>
<div id="5" class="maindiv">Contents in row 5</div>
<div id="3" class="maindiv">Contents in row 3</div>
<div id="1" class="maindiv">Contents in row 1</div>
<div class="main">Contents in test row</div>
<div id="4" class="maindiv">Contents in row 4</div>
答案 4 :(得分:0)
把它们放在一起:
Succint :(可能会对包含许多重复值的大型表产生一些性能影响)
$('tr').each(function(){
$("tr :contains('" + $('td', this).first().html() + "')").last()
.parent().css('color', 'red');
});
succint版本的说明: -
$('tr').each(function(){ // for each row of the table
$("tr // find a child inside a tr
:contains('" // that contains the text
+ $('td', this) // present within a td of the row (in line 1)
.first().html() // at the beginning
+ "')") // Using string concat to pass variable to `contains` selector)
.last() // at the end (last occurence of text)
.parent() // invoke `parent()` to select whole row
.css('color', 'red'); // apply css to identify the desired row.
});
详细 :(使用ECMAScript6的Set
或$.unique()
从名称的完整列表中删除重复项。这样,当forEach
循环时代码运行结束时,它每个名称只迭代一个。)
var uniqueNames = [];
$('tr').each(function(){
uniqueNames.push($('td', this).first().html());
}); // this will return the list of names from the table
// Remove duplicates from the list of names
uniqueNames = new Set(uniqueNames); // OR: uniqueNames = $.unique(uniqueNames);
uniqueNames.forEach(function(el){
$("tr :contains('" + el + "')").last().parent().css('color', 'red');
});